1.Calculate the annual interest and the increased principal when

a)k = 8500 and p = 2.5 %

b)k = 38000 and p = 9.85 %

c)k = 768.50 and p = 4.25 %

d)k = 520000 and p = 13.6 %

2.The principal of 30000 will be increased by compound interest of 4.5 % for 2 years, which after the interest rateis 5.5 % for 3 years, and after that 5.75 % for one year. Calculate the increased principal.

3. Calculate the increased principal after three years by adding an annual return of 5.3%, from which a tax of 28 % is deducted. The initial principal was 42000 .

4. Calculate the initial principal in the following cases:

increased principal interest rate time in years

a)10794.63 8 % 10

b)1083.66 15 % 50

c)58734.80 2.25 % semi-annually 11

d)13146.74 4 % quarterly 5

5. Michael sold his apartment and calculated that he had received an annual return of 8.5% when, after 5 years of living, he sold the apartment for 176500. How much had he originally paid for his apartment?